Convert an array representing the coefficients of a Laguerre series,
ordered from lowest degree to highest, to an array of the coefficients
of the equivalent polynomial (relative to the “standard” basis) ordered
from lowest to highest degree.

Parameters :

c : array_like

1-D array containing the Laguerre series coefficients, ordered
from lowest order term to highest.

Returns :

pol : ndarray

1-D array containing the coefficients of the equivalent polynomial
(relative to the “standard” basis) ordered from lowest order term
to highest.